Stop-motion mechanism.



H. J. MARX.

STOP MOTION MECHANISM. APPLICATION FILED I'EB.13, 1912.

Patented Feb. 18, 1913.

WITNESSES: INVENTOR fie/"27y :Zflfam, BY

fl n n WflvWi/ov. A TTORNEY.

COLUMBIA PLANOGRAPH C0,, WASHINGTON, D c.

UNITED STATES PATENT QFFIQE.

HENRY J. MARX, OF HOLYOKE, MASSACHUSETTS, ASSIGNOB T0 GREEN & I-IOPSON, A PARTNERSHIP COMPOSED OF SAMUEL 1V1. GREEN AND HARRY B. HOPSON, OF

SPRINGFIELD, MASSACHUSETTS.

STOP-MGTION MECHANISM.

To all 1071 am it may concern Be it known that I, HENRY J. Manx, a citizen of the United States of America, residing at Holyoke, in the county of Hampden and State of Massachusetts, have invented new and useful Improvements in Stop-Motion Mechanism, of which the following is a specification.

This invention relates to a stop motion mechanism for use in textile machinery, generally, wherever it is desired to stop such machinery in a quick and efficient manner.

The object of the invention is to provide such a mechanism which will operate efficiently to stop the machine to which it is attached before the thread breaks.

Further objects are to provide such a mechanism which can be made at low cost, which will be easy to apply to textile machines in general, and which is sure of operation and adjustable to the particular machine to which it may be attached.

For the purposes of illustrating applicants invention, itis shown and described herewith in connection with a spooling ma chine. It is to be understood, however, that the invention is not limited in its use to the specific machine in connection with which it is illustrated, but is capable of general application.

In the drawings forming part of this application,-Figure 1 is a side view of a spooling machine illustrating the invention in connection therewith, certain parts being shown in section. Fig. 2 is a perspective view of the essential parts of the invention with the anti-friction roller swung to the limit around its pivot. Fig. 3 is a cross sectional view taken along the line of the arrow of line 3-3, Fig. 2. Fig. at is a'plan view of parts shown in Fig.

Referring to Fig. 1, the frame 00 supports the uprights b on which the reels (4 are mounted to rotate, and thus allow the yarn t to feed to the spindle g for winding. The yarn from the reels a follows down under aporcelain roller 0, mounted as hereinafter described, up over a suitable guide (Z down again around another similar guide 0 and from thence through a traversing guide 2' to the spindle g which is mounted and operated in the usual manner. The traversing guide 71 is operated by a groove in Specification of Letters Patent.

Application filed February 13, 1&12.

Patented Feb. 18,1913.

Serial No. 677,820.

the face of the drum h to wind the yarn, as desired. The winding roll f is driven by contact with the drum it, also in the usual manner.

The specific mechanism involved in the stop motion is that disclosed in Figs. 2, 3, and 4:. An integral three-arm cast-ing or piece is pivoted on the frame at 7r. The arm Z has a straight face cooperating with a part of the frame to prevent a clock wise turning of the casting beyond a certain position, which brings it into the full line position, as seen in Fig. 1. Unless the casting is supported in such full line position, it will fall freely to the dotted line position shown in the same figure, wherein the hook r on the end of the arm n will engage a tooth on the normally rotating toothed wheel j. The consequent stoppage of this wheel will cause the stoppage of the whole machine, or such part of the machine as desired, in any of the well known ways.

The way in which the threearm casting is supported and released will now be described. The casting is pivoted at k and, as hereinbefore stated, it can not turn clockwise beyond the full line position shown in Fig. 1. In the normal operation the yarn 25, passing under the roller 0, supports the casting in said full line position. lVhenever the yarn snarls, or for any reason is put under excessive tension, that tension will cause the roller 0 and its bearing to turn or swing in a plane at right angles to the arm m to which it is pivoted, as shown in Fig. 3, through an angle not exceeding 90, the stop a on the arm at cooperating with the shoulders 25 in the part 5 to limit such swinging movement. The roller 0, in thus swinging through the whole or part of the 90 angle, will change from full line position, shown in Fig. i, to the dotted line position in that figure. The spring 0 mounted, as shown, will resist this turning movement to a degree determined by the adjusting screw q. The thread t is, by the above described movement, released from engagement with the roller. The instant that the thread leaves the roller the three-arm casting is free to fall immediately into the dotted line position shown in Fig. 1, whereby the hook 7' will stop the rotation of the wheel j with the desired result.

The time necessary for the casting to fall and stop the machine is easily determined. The time rate of winding is known for a particular machine. Therefore the thread 25 can be guided from the reel a to the spindle g, as shown, so that the time taken for the spindle to take up the loops of yarn between it and the reel (4 will be greater than the time necessary for the stop motion to operate. Therefore, at no time will it be necessary for the yarn to be broken to operate the stop motion. On the contrary, by the use of applicants device, the excessive tension on the yarn is relieved by the action of the stop motion mechanism, and the breakage of the yarn is prevented. After the stop motion mechanism has operated, the yarn an be restored to proper condition to start winding again. The three-arm casting is down out of the way of the operator while repairs are made and is quickly restored to operative condition by swinging it up into place and passing the yarn again around the roller. The latter is normally kept in proper position by the spring 0 which never passes across centers, a fact which is clear from Figs. 2 and 4t.

Applicants structure is simple, low of cost, compact, of few parts, unlikely to get out of order, and is so mounted that it does not get in the operators way.

hat I claim is 1. A textile machine including means for moving yarn, a stop motion mechanism comprising an arm pivotally mounted in the machine with means for positively limiting the angular movement of said arm in one direc tio-n, a yarn-guiding device pivoted on said arm by means of which the yarn, while passing from one point in the machine to another, can form a loop and hold the arm in its limiting position, said device being mow ably arranged relatively to said arm, together with means to oppose said movement and maintain the device in a normal position whereby a tension of the yarn suilicient to overcome said last mentioned means will cause said device to move, release the yarn therefrom and allow said arm to take :1 normal position in which it is adapted to stop the yarn moving means before the latter takes up the loop in the yarn.

2. A. stop motion device comprising an arm, an antifriction device for guiding yarn pivoted to said arm for independent limited movement thereon, a second arm lixed to the first arm, said arms being arranged for pivotal attachment to a textile frame, a spring attached to said second arm and said anti-friction device to hold the latter in one of its limiting positions in which it guides yarn, said device being arranged to approach its other limiting position against the action of the spring when the thread guided thereby is subjected to abnormal tension and thereby allows the yarn to slip therefrom, all for the purpose described.

A stop motion mechanism comprising three rigidly connected arms in approximately the same plane which are adapted to swing as a unit about a pivot, a fourth arm pivoted to one of said arms at right angles thereto having a bearing therein, an antifriction roller mounted on the bearing, under which yarn is adapted to pass and support the mechanism, a spring connected with one of said arms and said pivoted arm to keep the latter normally perpendicular to the plane of the three arms against a stop, said anti-friction roller being adapted to be pulled by the yarn from its normal plane against the action of the spring to a position approximating the plane of the three arms thus releasing the yarn from the roller and allowing the mechanism, as a, whole, to turn on its pivot, all for the purpose described.

t. A stop motion mechanisi'n comprising an anti-friction device arranged to guide yarn in one plane, a support to which said device is connected, said. support arranged to be connected to a textile frame for relative movement therewith, said support having a normal position in which it can be utilized to stop the operation of a machine to which it may be attached, a yielding means to keep said anti-friction device in a normal position relative to its support, wherein said device guides yarn under normal tension and thereby maintains said support away from its normal position, said yielding means adapted, on abnormal tension of the thread, to permit said anti-friction device to move out of the plane of thread travel and thus allow said support to assume its normal position, all for the purpose described.

HENRY J. MARX. Witnesses I. E. HOLMES, Minnie FINEREN.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents, Washington, D. C. 

